. Evolution and animal life; an elementary discussion of facts, processes, laws and theories relating to the life and evolution of animals . FIG. 77.—Diagram showing variation in pattern of the prothorax of a flower bugc (After Kellogg and Bell.) individuals there were in the right tibiae, five spines in 5, fourspines in 40, three spines in 43, two spines in 9, and one spine in1 individual: in the left tibiae, five spines in 2 individuals, fourspines in 48, three spines in 39, and two spines in 8. In the paper from which we have taken these illustrationsof the actuality of variation, studied a
. Evolution and animal life; an elementary discussion of facts, processes, laws and theories relating to the life and evolution of animals . FIG. 77.—Diagram showing variation in pattern of the prothorax of a flower bugc (After Kellogg and Bell.) individuals there were in the right tibiae, five spines in 5, fourspines in 40, three spines in 43, two spines in 9, and one spine in1 individual: in the left tibiae, five spines in 2 individuals, fourspines in 48, three spines in 39, and two spines in 8. In the paper from which we have taken these illustrationsof the actuality of variation, studied and statistically tabulated,are given the data showing the actual extent and frequency ofvariations in various characters, such as color patterns of head,thorax, and abdomen, character of antennal segments, numberof tibial spines, character of elytra! striation, character of vena- 136 EVOLUTION AND ANIMAL LIFE tion, number of wing hooks, etc., in two dozen different insectspecies. Long ago Dr. J. A. Allen, of the American Museum ofNatural History, gave similar data of the actual variation in. FIG. 78.—Red-legged locust, Melanoplus FIG. 79.—The seventeen-year locust, Cicada femur-rubrum, and hind tibia, showing septendecim, and its hind tibia, showing inner and outer rows of spines. (After inner and outer spines. (After Kellogg Kellogg and Bell.) and Bell.) various familiar American bird species, his data referringchiefly to variations in dimensions; as length of whole body,length of tail, of wing, of bill, of tarsus and claw, etc. CARDINALIS V/ftG/WANUS 58 specimens, Florida. Tail. Length of Bird Winy. • • • • •«>••< • •••• FIG. 80.—Diagram showing variation in length of tail, body, and wing in fifty-eightspecimens of the card^al, Cardinalis (formerly called virginianus), from Florida.(After Allen.) And anyone with means of collecting considerable series ofindividuals of single species can, if he but give the time andstudy to it, reveal
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